Growing More Without Growing More Land

Global demand for Artemisia annua has grown steadily since its main compound became central to first-line antimalarial treatment worldwide. That demand has put pressure on supply, and a fair amount of agricultural and plant-science research has focused on a very practical question: how do you get more, and more consistent, plant material without simply expanding the amount of land under cultivation.

The scale of the constraint

A 2025 review in Malaria Journal lays out just how tightly the world's supply of artemisinin depends on this one crop, and surveys the agricultural constraints that limit how much of it can reliably be grown (Farmanpour Kalalagh et al., 2025). The review frames the challenge as two-sided: producing enough of the plant's chemistry reliably, while also managing broader concerns about resistance developing in the disease the compound treats. On the agricultural side specifically, the paper points to cultivation-level interventions, things that change how a field is managed, not what land it occupies, as one of the more promising paths to closing the supply gap.

A cheap, low-tech intervention: soil fungi

One of the more accessible findings in this space comes from studies of arbuscular mycorrhizal fungi (AMF), a group of naturally occurring soil fungi that form partnerships with plant roots. In a field study, A. annua plants grown in partnership with the fungus Rhizophagus irregularis showed a 30 percent increase in fresh leaf biomass during the growing season, a 40 percent increase in the density of the glandular hairs where the plant's key compounds are stored, and a 17 percent increase in artemisinin content compared to uninoculated control plants (Domokos et al., 2018). The same research group later confirmed that several different soil types, not just one ideal substrate, could support this kind of fungal partnership well enough to meaningfully help small-scale cultivation (Domokos et al., 2020).

Why this counts as sustainability, not just yield

What makes this line of research relevant to sustainable farming, rather than simply higher output, is what it does not require: no additional fertilizer input, no genetic modification, no new farmland. AMF occurs naturally in many soils already, and the intervention studied is essentially about managing soil biology so an existing beneficial relationship can do more work. The same 2018 field study noted that plants under fungal colonization also showed signs of better resilience under water-limited conditions, a detail that matters directly for farms working with unpredictable rainfall.

None of this is a guarantee that any specific field will see these exact results, soil, climate and existing microbial populations all vary. But it points toward a genuinely low-input direction for improving both the amount and quality of what a given plot of land can produce.

This article reports published research on the plant. It is not medical advice, and our tea is sold as a food product, not a medicine.